MS-203 - Microsoft 365 Messaging Mail Flow and Connectors Questions and Answers

Question 1

Your organization has a hybrid Exchange environment with mailboxes both on-premises and in Exchange Online.
You need to ensure that all outbound email from Exchange Online to your on-premises servers is encrypted using TLS.
Which of the following is the BEST way to achieve this?

Accepted Answer

Create an outbound connector from Office 365 to your organization's email server and enforce TLS.

Answer

Create a mail flow rule to require TLS for messages sent to the on-premises domain.

Answer

Configure a remote domain for the on-premises environment to require TLS.

Answer

Enable STARTTLS on the on-premises Receive connector.

Question 2

A company, Contoso, Ltd., wants to route all outbound email through a third-party cloud service for advanced compliance archiving before final delivery to the internet. As the messaging administrator, what combination of configurations is required in Exchange Online to implement this solution?

Accepted Answer

An outbound connector to the partner organization and a mail flow rule to redirect messages.

Answer

An inbound connector from the partner organization and a mail flow rule.

Answer

Only an outbound connector configured to route all mail through a smart host.

Answer

A remote domain entry for '*' and an outbound connector.

Question 3

Your company uses a third-party anti-spam service. The service filters all inbound mail and then forwards it to your Exchange Online tenant. You notice that legitimate emails from this service are sometimes being incorrectly marked as spam by Exchange Online Protection (EOP). Which of the following is the most effective way to prevent EOP from filtering mail that has already been scanned by the trusted third-party service?

Accepted Answer

Create a mail flow rule to set the SCL to -1 for messages from the service's IP addresses.

Answer

Add the service's domain to the safe senders list in the anti-spam policy.

Answer

Configure Enhanced Filtering for Connectors (Skip Listing) on the inbound connector from the service.

Answer

Create a remote domain for the third-party service and disable spam filtering.

Question 4

An administrator needs to configure mail flow for a newly added domain, `subsidiary.contoso.com`. The company's primary email domain is `contoso.com`. Some mailboxes for the new domain exist in Exchange Online, while others are still on a non-Exchange on-premises server. Email for any non-existent user at `subsidiary.contoso.com` should be routed to the on-premises server. What type of accepted domain should be configured for `subsidiary.contoso.com`?

Accepted Answer

Internal Relay

Answer

External Relay

Answer

Authoritative

Answer

Non-Authoritative

Question 5

Which of the following components in Exchange Online is used to control settings for messages sent TO external domains, such as managing out-of-office replies, delivery reports, and message formatting like TNEF (winmail.dat)?

Accepted Answer

Remote Domains

Answer

Accepted Domains

Answer

Connectors

Answer

Mail Flow Rules

Question 6

A developer needs to configure a line-of-business application running on an on-premises server to send email notifications to external recipients using the company's domain. The application does not support modern authentication. The administrator wants to securely allow this relay through Microsoft 365. Which of the following is the most appropriate configuration?

Accepted Answer

Create an inbound connector of the type 'On-premises' that is scoped to the application server's public IP address.

Answer

Configure an outbound connector from Office 365 to a partner organization.

Answer

Use SMTP AUTH with a licensed mailbox and basic authentication.

Answer

Configure a mail flow rule to allow relay from the application's email address.